Volumetric rotary machine operating in



Feb. 14, 1956 E. F. PORTE 2,734,461

VOLUMETRIC ROTARY MACHINE OPERATING IN A CONTINUOUS STREAM OF FLUID Filed Dec. 11, 1952 IN VENTOR EUGENE FEEDER/C FORTE AGENTS United States Patent Oflice 2,734,461 Patented Feb. 14, 1956 VOLUMETRIC ROTARY MACHINE OPERATING IN A CONTINUOUS STREAM OF FLUID Eugene Frrlrlc Porte, Ncuilly-sur-Seine, France Application December 11, 1952, Serial No. 325,350 Claims priority, application France April 18, 1952 6 Claims. (Cl. 103-121 My invention relates to a volumetric rotary machine operating in a continuous stream of fluid and adapted for use as a pump, a compressor, a meter, a motor and all like applications in which a continuous stream of liquids is provided.

My invention relates more particularly to those volumetric rotary machines operating in a continuous stream of fluid, that include inside a case defining an admission compartment and a delivery compartment, a rotor forming a drum shaped solid of revolution provided with inner radial blades, said rotor being adapted to revolve with a minimum clearance inside a housing provided in the case adjacent the admission and delivery compartments, and a core forming also a solid of revolution and revolubly mounted inside the casing round an axis parallel with the axis of the rotor, and inwardly tangent to the latter along a common generating line lying in the plane defined by the stationary geometrical axes of rotation of the rotor and of the core, said rotor being provided with suitable perforations through which it communicates periodically through the variable volume chambers, defined between the blades, the rotor and the core, selectively with the admission and delivery chamber.

My invention has for its particular object. a novel rotary volumetric machine of the above type provided with blades and operating in a continuous stream of fluid and, according to my invention, the blades are secured to the rotor while'means are provided to allow the inner ends of the blades to engage the core while ensuring fluidtighness between the chambers limited by said blades, the rotor and the core and lastly means are provided for driving the rotor and the core at the same angular speed.

The rotary machine according to my invention shows further, in apreferred embodiment, the following features: the blades secured to the cylindrical rotor are fitted inside solid lateral flanges rigid with said rotor while the latter is provided with radial openings-the guiding means for the blades inside the cylindrical core are constituted by parts rockably mounted so as to revolve round spindles rigid with the core and extending in parallelism with the axis of the latter, said rocking members being each provided with a slideway inside which is fitted the inner end of the corresponding bladethe driving means are constituted by a system of spindles parallel to the axes of the rotor and of the core, and adapted to revolve freely inside the lateral flanges of the rotor, each of said spindles carrying a cylindrical roller engaging with slight friction the inner surface of a corresponding bore of a larger diameter formed inside the core-these cylindrical rollers are tangent to the corresponding bores formed in the core and the eccentricity of the bores with reference to the axes of the rollers is the same as that of the core with reference to the rotor. The axes of the rollers and the axes of the corresponding bores lie respectively along the edges of two geometrical prisms the cross sections of which are constituted by equilateral triangles, assuming the same size and the sides of which extend in parallelism. This latter arrangement allows the rotor and the core to be driven in unison by a single shaft passing out of the casing through fluidtight packings; these driving spindles associated with the cylindrical rollers may be three in number, and be distributed uniformly round the axis of the rotor, i. e. at from each other, which leads to an accurate drive and a proper balance of the moving parts. Of course, conventional fluidtight means are provided in the case at the periphery of the rotor so as to prevent any direct communication between the admission and delivery compartments.

The rotary machine provided with blades according to the invention is of a simple and sturdy structure, its blades are submitted only to the stresses arising through the propulsion of the fluid through the machine and the power required for driving the core is transmitted entirely by the eccentric cylindrical rollers that are mounted so as to revolve freely between the side walls of the rotor round the spindles carrying them.

1 will now describe, by way of example of the possible embodiments of my invention, without this meaning any limitation of the scope of the latter, an exemplary embodiment illustrated in accompanying drawings wherein:

Fig. 1 is a cross sectional view of a pump executed in accordance with my invention, the section passing through the rotary axis of the pump and through line I--I of Fig. 2.

Fig. 2 is a cross-section of the same pump through line Il-II of Fig. -l.

The pump 1 includes a case 2 assuming the general shape of a cylinder into which open two enlargements 3 tapped at 4 and forming headers or compartments for the admission and delivery of a liquid. The case 2 is closed laterally on one side by a solid flange 5 and on the opposite side by a flange 6 through which passes a stub shaft 7 adapted to provide for the driving of the pump 1. The flanges 5 and 6 are connected with each other and with the case 2 by means of bolts 8 carrying nuts for clamping them in position.

The end of the stub-shaft 7 on the inside of the casing is held-in a sleeve 9 forming a smooth bearing and housed inside a bore formed inside a cylindrical boss 10 projecting from the inner surface of the flange 5, said boss 10 being eccentric with reference to the sleeve 9. A roller bearing 11 is housed inside the flange 6 for carrying the stub shaft 7 between the outer surface of the flange 6 and a protecting cover 12; said cover holding the bearing 11 in position is secured by means of screws 13 to the outer flange 6. The ball bearing 11 has its outer race held fast against a washer while 15 designates a felt packing engaging the stubshaft as it passes through the cover 12, and 16 a fluidtight ring housed inside a bore of the flange 6 and engaging the washer 14 and the periphery of the stub shaft 7 on the inside of the latter.

An annular rotor 17 is rigid with the inner end of the stub shaft 7 through the agency, on one hand, of a lateral flange 18 provided with a tapping screwed over a corresponding thread on the stub-shaft 7 and, on the other hand, of a threaded ring 19 screwed inside an inner corresponding thread of the annular rotor 17 and engaging a corresponding surface of the flange 18. The rotor 17 is closed on the side opposed to the flange 18 by another flange 20 that is held in position by a thread ed ring 21 screwed into a corresponding tapping formed along the corresponding edge of the rotor 17.

The rotor 17 is provided inwardly with three radial blades 22, fitted through their outer ends inside said rotor; the rotor 17 is further provided with ports 24 wherethrou'gh the inside of the rotor communicates with the case compartments 3.

The pump 1 includes furthermore a cylindrical core 25 mounted eccentrically with reference to the rotor 17 and that is inwardly tangent to the latter along a common generating line; the core 25 is carried 'by a sleeve 26 fitted over the eccentric cylindricalboss referred to hereinabove.

The core 25 revolves in unison with the rotor 17 as provided by three spindles '27 the ends of which are revoluhly carried in cylindrical 'blind holes formed in the ffianges 18 and '20 of the rotor. 'The spindles 27 are distributed uniformly round the axis of the rotor 17 and at .equal distances therefrom.

They each carry in their medial section a cylindrical roller .23 tangent to the inner surface o'fa cylindrical bore 28 formed in the core and the axis of which assumes with reference to the spindle 27 an eccentricity that is equal .to that of .the core 25 with reference to the rotor 17; the rollers 23 that are freelymounted on the spindles '27 may revolve in the three corresponding bores 28 thus formed in the core 25. The axes of said bores 28 are angularly .set with reference to the geometrical axis of the core 25 in the same manner as the spindles 27 are set with reference .to the geometrical .axis of the rotor 17. By reason of this arrangement, the rollers 23 drive the core 25, when the .rotor 17 revolves, at the .same angular speed as said .rotor. The core 25 is also provided with three members 29 assuming the shape of circular sectors rockably mounted round spindles 30 carried by the core 25.; said sector shaped members 29 are provided each with a cylindrical bore inside which may revolve a spindle 32 and each spindle 32 is provided with a radial slideway 31 inside which the corresponding'blade 22 may slide with slight friction.

Fluidtight ,packings shown at 33 and 34 prevent direct communication between the two compartments 3, said packings being provided in the part of the case wall engaging the periphery of the rotor.

The above-described pump operates as follows:

Referring to Fig. 2, if it is assumed that the right hand compartment 3 is connected with an admission pipe, and the left hand compartment 3 is connected with the delivery pipe, the rotor 7 will be caused to revolve clockwise through any suitable means, this rotation of the rotor producing that of the stub shaft 7 through any suitable means. The core .25 is driven at the same angular speed as the rotor 17 through the spindles27 carrying the cylindrical rollers 23; the liquid is sucked into the chamber designated by the reference letter A until said chamber enters the. position designated by B. The liquid removed from .said chamber '3 is delivered completely into the delivery pipe when the rear blade closing said chamber B moves pastithe front edge defi ng the delivery compartment which is that shown on the left hand side of Fig. 2.

The arrangement shown is of advantage when the pump is to 'be overhauled after a long duration "as the blades are submitted in practice to no noticeable wear.

Obviously it is possible to introduce various changes, improvements or additions to the machine disclosed or else to replace certain parts by equivalent parts withoutunduly widening thereby the scope of the invention as defined in accompanying claims, for instance the :rollers 23 may be in one with the corresponding spindles 27 which latter revolve between the side flanges of the rotor.

What I claim is:

1. In a rotary volumetric machine operating in a continuous stream of fluid of the type comprising a fluidtight casing, a barrelvshaped cylindrical rotor having internal radial blades secured thereto, a cylindrical core internally tangent to the rotor, the core having oscillataole slides each cooperating with one of the rotor blades, a shaft supporting the core, and means establishing a mechanical connection between the rotor and the core whereby the former drives the latter at the same angular velocity: a longitudinally grooved rock shaft constituting each of said slides, a rocking member having a cylindrical recess in which said rock shaft is positioned, a pivotal connection between said rocking member and core adjacent said core shaft, and said core having recesses in each of which one of said rocking members is positioned with sufficient'clearance to allow rocking movement thereof about said pivotal connection.

2. A machine as in claim 1 wherein said rocking members and recesses are of cylindrical sectorial outline.

3. A machine as in claim 1 comprising fluid inlet and outlet chambers in the casing, and ports in the cylindrical wall of the rotor communicating alternately with said chambers as the rotor is rotated.

4. A machine as in claim 3 wherein the rotor is in sliding contact with 'the interior of the casing intermediate said chambers.

5. A machine as in claim 3 wherein said chambers are positioned symmetrically with respect to the axis of the axis of the casing.

6. A machine as in claim 1 including a drive connection between the rotor and core comprising recessed raceways in the core and roller members pivoted on the rotor and engaged inside said raceways.

References Cited in the file of this :patent UNITED STATES PATENTS 1,210,042 Bollard Dec. 26, 191$ FOREIGN PATENTS 363,471 Great Britain Dec. 24, 193:1

439,155 Great Britain NOV. 29, 1935 

